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Cisco IOS Telephony Service, Version 2.02
Chapter 5 Command Reference
pattern trunk-to-ext busy (vm-integration)
Usage Guidelines The pattern trunk-to-ext busy command is used to configure the sequence of DTMF digits passed to a
voice-mail system attached to the Cisco IOS Telephony Service router through one or more voice ports.
When a call is routed to the voice-mail system by call forward on busy from an IP phone attached to the
Cisco IOS Telephony Service router, the voice-mail system expects to receive a sequence of digits
identifying the mailbox associated with the forwarding phone together with digits indicating that the call
originated from a Public Switched Telephone Network (PSTN) or Voice over IP (VoIP) caller.
Although it is unlikely that you will use multiple instances of the CGN, CDN, or FDN keyword in a
single command line, it is permissible to do so.
Examples The following example sets the DTMF pattern for call forwarding when an external trunk call reaches a
busy extension and the call is forwarded to the voice-mail system:
Router(config) vm-integration
Router(config-vm-integration) pattern trunk-to-ext busy 6 FDN * CGN *
Related Commands Command Description
pattern direct Configures the DTMF digit pattern forwarding necessary to activate the
voice-mail system when the user presses the messages button on the phone.
pattern ext-to-ext busy Configures the DTMF digit pattern forwarding necessary to activate the
voice-mail system once an internal extension fails to connect to an
extension and the call is forwarded to voice mail.
pattern ext-to-ext
no-answer
Configures the DTMF digit pattern forwarding necessary to activate the
voice-mail system once an internal extension fails to connect to an
extension and the call is forwarded to voice mail.
pattern trunk-to-ext
no-answer
Configures the DTMF digit pattern forwarding necessary to activate the
voice-mail system when an external trunk call reaches an unanswered
extension and the call is forwarded to voice mail.
vm-integration Enters voice-mail integration mode and enables voice-mail integration with
DTMF and analog voice-mail system.
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